溶剂热辅助溶胶-凝胶法制备微纳米晶ZrSiO4陶瓷  

Preparation of micro-nanocrystal ZrSiO4 ceramics by solvothermal-assisted sol-gel process

作　　者：江正迪 熊天恒 柏子梅 杨文平 段涛[1] 丁艺[1] JIANG Zhengdi;XIONG Tianheng;BAI Zimei;YANG Wenping;DUAN Tao;DING Yi(School of National Defense Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China)

机构地区：[1]西南科技大学国防科技学院

出　　处：《功能材料》2019年第12期12206-12209,共4页Journal of Functional Materials

基　　金：西南科技大学龙山人才资助项目(18lzx546)

摘　　要：采用溶剂热辅助溶胶-凝胶法,以氯氧化锆(ZrOCl2·8H2O)和正硅酸乙酯(TEOS)为原料,以乙醇溶液为溶剂介质,制备锆石(ZrSiO4)前驱体,将前驱体在1 400 ℃下煅烧6 h,即得微纳米晶ZrSiO4陶瓷(200~450 nm)。借助X射线衍射仪、扫描电子显微镜和密度测试仪对固化体进行分析测试,研究溶剂热温度和乙醇浓度对固化体的物相结构、微观形貌及致密性的影响规律。研究发现,溶剂热温度和乙醇浓度对固化体的合成及致密性具有较大的影响。在溶剂热温度为110 ℃及乙醇浓度为60%条件下,获得的微纳米晶ZrSiO4陶瓷具有较高密度(4.46 g/cm3)。Solvothermal sol-gel method was used to prepare zircon (ZrSiO4) precursor with zirconium oxychloride (ZrOCl2·8H2O) and tetraethyl orthosilicate (TEOS) as raw materials and ethanol solution as solvent medium. The precursor was calcined at 1 400 ℃ for 6 h, and then the micro-nanocrystal ZrSiO4 ceramics (200-450 nm) were obtained. The effects of solvothermal temperature and ethanol concentration on the phase structure, morphology and compactness of the cured body were studied by means of X-ray diffraction, scanning electron microscopy and density tester. It was found that the solvothermal temperature and ethanol concentration had great influence on the synthesis and compactness of the cured solvents. The micro and nanocrystalline ZrSiO4 ceramics had high density (4.46 g/cm3) at the solvothermal temperature of 110 ℃ and the concentration of ethanol of 60%.

关 键 词：溶剂热辅助溶胶-凝胶法 微纳米晶 ZrSiO4陶瓷 溶剂热温度 乙醇浓度 

分 类 号：TL941[核科学技术—辐射防护及环境保护]